Backend Software Developer Jobs at Klaviyo with Visa Sponsorship
Klaviyo's backend engineering teams work on high-scale data infrastructure, API systems, and platform reliability for a fast-growing marketing technology company. Klaviyo has a track record of sponsoring visa petitions for backend roles and supports both H-1B and employment-based Green Card pathways for qualified engineers.
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Get Access To All JobsINTRODUCTION
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.
ABOUT THE JOB
Why You Should Join the Onboarding Team
The Product Expansion / Activation team at Klaviyo is focused on improving the early experience of Klaviyo for new customers. We work diligently to improve the rate at which customers are successfully setting up their Klaviyo account and gaining value from the platform. Engineers on the team use data to discover opportunities for improvement, implement A/B tests to validate ideas, and work across the product to iteratively improve UX and reduce friction for new customers. We are looking for great generalist software engineers with a passion for the experience-layer that have an interest in or experience with growing a user-base and building a great customer onboarding pipeline and experience.
HOW YOU WILL MAKE A DIFFERENCE
- In this role, you will implement user-experience improvements across the Klaviyo product, especially in areas that affect new customers.
- You will design and implement A/B tests to validate ideas, and interpret the results of these tests to inform iterative improvements to the product.
- You will collaborate with marketing, data-science, sales, and engineering teams to discover areas for improvement, as well as engaging with customers directly to learn more about how we can better serve their needs.
- You will help us improve our experimentation and development processes, and mentor other engineers on the team.
- You will clearly define the goal, constraints, and context for AI agents, while remaining responsible for the correctness of the implementation, with a focus on security, performance, and maintainability.
- Working from our Boston HQ at least three days a week.
WHO YOU ARE
- Have a background in full stack software engineering with experience building and improving products with an emphasis on user-facing features, along with the APIs and infrastructure to support them.
- Passionate about growing and improving a product on a daily basis using a data driven mindset.
- Experienced with A/B Testing products with metric based goals to improve user experience and customer acquisition and success (nice to have).
- Demonstrated ability and success in using AI-driven software delivery practices and methods and/or a willingness and excitement to learn.
- Thrives in an entrepreneurial type environment that is fast paced, customer focused, and strategic.
TECHNOLOGIES WE USE
HTML, TypeScript, JavaScript, React
Python, Django
MySQL, Cassandra, RabbitMQ, Redis
Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Ansible, Packer, and other DevOps tools
COMPENSATION
- Base Pay Range For US Locations: $116,000—$174,000 USD
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.
GET TO KNOW KLAVIYO
We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.
AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.
INTRODUCTION
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.
ABOUT THE JOB
Why You Should Join the Onboarding Team
The Product Expansion / Activation team at Klaviyo is focused on improving the early experience of Klaviyo for new customers. We work diligently to improve the rate at which customers are successfully setting up their Klaviyo account and gaining value from the platform. Engineers on the team use data to discover opportunities for improvement, implement A/B tests to validate ideas, and work across the product to iteratively improve UX and reduce friction for new customers. We are looking for great generalist software engineers with a passion for the experience-layer that have an interest in or experience with growing a user-base and building a great customer onboarding pipeline and experience.
HOW YOU WILL MAKE A DIFFERENCE
- In this role, you will implement user-experience improvements across the Klaviyo product, especially in areas that affect new customers.
- You will design and implement A/B tests to validate ideas, and interpret the results of these tests to inform iterative improvements to the product.
- You will collaborate with marketing, data-science, sales, and engineering teams to discover areas for improvement, as well as engaging with customers directly to learn more about how we can better serve their needs.
- You will help us improve our experimentation and development processes, and mentor other engineers on the team.
- You will clearly define the goal, constraints, and context for AI agents, while remaining responsible for the correctness of the implementation, with a focus on security, performance, and maintainability.
- Working from our Boston HQ at least three days a week.
WHO YOU ARE
- Have a background in full stack software engineering with experience building and improving products with an emphasis on user-facing features, along with the APIs and infrastructure to support them.
- Passionate about growing and improving a product on a daily basis using a data driven mindset.
- Experienced with A/B Testing products with metric based goals to improve user experience and customer acquisition and success (nice to have).
- Demonstrated ability and success in using AI-driven software delivery practices and methods and/or a willingness and excitement to learn.
- Thrives in an entrepreneurial type environment that is fast paced, customer focused, and strategic.
TECHNOLOGIES WE USE
HTML, TypeScript, JavaScript, React
Python, Django
MySQL, Cassandra, RabbitMQ, Redis
Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Ansible, Packer, and other DevOps tools
COMPENSATION
- Base Pay Range For US Locations: $116,000—$174,000 USD
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.
GET TO KNOW KLAVIYO
We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.
AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.
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Get Access To All JobsTips for Finding Backend Software Developer Jobs at Klaviyo Jobs
Frame your systems experience around Klaviyo's stack
Klaviyo's backend runs on Python, Kafka, and large-scale data pipelines. Before applying, tailor your resume and portfolio to reflect distributed systems, event-driven architecture, or high-throughput API work so your credentials clearly map to their engineering priorities.
Target roles marked as engineering-level positions
Klaviyo's H-1B sponsorship applies to specialty occupation roles requiring a directly related bachelor's degree. Software Developer positions at mid to senior levels fit that standard most cleanly, so focus your applications there rather than junior or contractor postings.
Confirm Green Card pathway support during the offer stage
Klaviyo sponsors both EB-2 and EB-3 green cards, which require PERM labor certification through the DOL. Ask your recruiter directly whether the specific backend role you're offered is eligible for PERM sponsorship, since not all open positions are designated for permanent residency.
Use Migrate Mate to identify active backend openings at Klaviyo
Sponsorship-eligible roles can open and close quickly at Klaviyo. Use Migrate Mate to filter current Backend Software Developer postings at Klaviyo that are open to visa sponsorship, so you're applying to live opportunities rather than roles that have already closed.
Prepare your degree equivalency documentation early
USCIS scrutinizes specialty occupation claims for backend roles when the petitioner's degree is from outside the U.S. Get a credential evaluation from a NACES-approved evaluator before your offer letter stage so your employer's immigration attorney has documentation ready without delaying your I-129 filing.
Backend Software Developer at Klaviyo jobs are hiring across the US. Find yours.
Find Backend Software Developer at Klaviyo JobsFrequently Asked Questions
Does Klaviyo sponsor H-1B visas for Backend Software Developers?
Yes, Klaviyo sponsors H-1B visas for Backend Software Developer roles. The position qualifies as a specialty occupation under USCIS standards, requiring a bachelor's degree or higher in computer science, software engineering, or a related field. Sponsorship is typically offered to mid-level and senior engineers, and your employer files the H-1B petition on your behalf after the USCIS lottery selection.
How do I apply for Backend Software Developer jobs at Klaviyo?
Applications go through Klaviyo's careers page, where backend engineering roles are listed by team and seniority. You can also find sponsorship-eligible Backend Software Developer openings at Klaviyo on Migrate Mate, which filters specifically for visa-sponsored positions. The process typically includes a recruiter screen, technical assessments covering system design and coding, and a final round of interviews with the engineering team.
Which visa types does Klaviyo use for Backend Software Developer roles?
Klaviyo sponsors H-1B visas for initial work authorization and supports EB-2 and EB-3 immigrant visa categories for employees pursuing a Green Card. Backend engineers already in the U.S. on OPT or STEM OPT are common candidates for H-1B sponsorship. The EB-2 route is more common for senior engineers, while EB-3 covers a broader range of qualified software development roles.
What qualifications does Klaviyo expect for Backend Software Developer roles?
Klaviyo's backend roles typically require a bachelor's degree in computer science or a closely related discipline, along with demonstrable experience in Python, distributed systems, or API development at scale. For H-1B sponsorship purposes, your degree must relate directly to the duties of the specific role. Senior positions often expect prior experience with event-driven architectures, data pipelines, or high-availability systems in a production environment.
How long does the H-1B sponsorship process take with Klaviyo?
The standard H-1B timeline runs from March registration through an October 1 start date, roughly six to seven months from lottery selection to work authorization. USCIS premium processing, which expedites adjudication to around 15 business days, is available and commonly used by technology employers. If you're on OPT with a valid STEM extension, you can bridge the gap between your current authorization and your H-1B start date without interruption.
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